Lens driving apparatus, and camera module and optical device comprising same

ABSTRACT

A lens moving apparatus includes a housing, a bobbin disposed in the housing, a first coil disposed on the bobbin, a magnet configured to move the bobbin in a first direction parallel to an optical axis by an electromagnetic interaction with the first coil, an elastic member coupled to the bobbin, and a second coil disposed on the housing. A first portion of the second coil is coupled to the housing. The second coil generates an induction voltage resulting from an inductive interaction with the first coil when the bobbin moves in the first direction.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.16/495,339, filed Sep. 18, 2019 (now U.S. Pat. No. 10,921,547 issued onFeb. 16, 2021), which is the National Phase of PCT InternationalApplication No. PCT/KR2018/003416, filed on Mar. 23, 2018, which claimspriority under 35 U.S.C. 119(a) to Patent Application No.10-2017-0040003, filed in the Republic of Korea on Mar. 29, 2017, all ofwhich are hereby expressly incorporated by reference into the presentapplication.

TECHNICAL FIELD

Embodiments relate to a lens moving apparatus and a camera module and anoptical instrument including the same.

BACKGROUND ART

It is difficult to apply technology related to a voice coil motor (VCM)used in a conventional general camera module to alow-power-consumption-type subminiature camera module. For this reason,research related thereto has been actively conducted.

The demand for electronic products, such as a smartphone and a cellularphone equipped with a camera, and the production of such electronicproducts have increased. A camera for cellular phones has been developedso as to have a large number of pixels and to be realized in miniature.As a result, an actuator has also been developed so as to have a smallsize, a large diameter, and multiple functions. In order to realize ahigh-resolution camera for cellular phones, an improvement in thefunction of the camera for cellular phones, auto focusing, the reductionof shutter shaking, and additional functions, such as a zoom function,are required.

DISCLOSURE Technical Problem

Embodiments provide a lens moving apparatus configured such that asoldering process is directly performed without separate wirearrangement for a second coil at the time of soldering between thesecond coil and lower springs and such that the movement or shaking ofthe second coil is prevented at the time of soldering, thereby improvingsolderability, and a camera module and an optical instrument includingthe same.

Technical Solution

In one embodiment, a lens moving apparatus includes a housing includinga first protrusion and a second protrusion at the lower portion thereof,a bobbin disposed in the housing, a first coil disposed in the bobbin, amagnet disposed in the housing, the magnet being disposed so as tocorrespond to the first coil, a second coil disposed on the outersurface of the housing, an upper elastic member coupled to the upperportion of the bobbin, and a lower elastic member coupled to the lowerportion of the bobbin, wherein the lower elastic member includes a firstspring, a second spring, a third spring, and a fourth spring disposed soas to be spaced apart from each other, a portion of the second coil iswound around the first protrusion at least once and is connected to thefirst spring, and another portion of the second coil is wound around thesecond protrusion at least once and is connected to the second spring.

A portion of the first coil may be connected to the third spring, andanother portion of the first coil may be connected to the fourth spring.

The lower elastic member may include an inner frame coupled to the lowerportion of the bobbin, an outer frame coupled to the housing, and aconnection portion connecting the inner frame and the outer frame toeach other.

The second coil may include a first portion disposed at the outersurface of the housing, a second portion wound around the firstprotrusion, a third portion connecting one end of the first portion andone end of the second portion to each other, a fourth portion woundaround the second protrusion, and a fifth portion connecting the otherend of the first portion and one end of the fourth portion to eachother.

The lens moving apparatus may further include a first solder portion,disposed on the outer frame of the first spring and on the secondportion of the second coil, and a second solder portion, disposed on theouter frame of the second spring and on the fourth portion of the secondcoil.

The second coil may include a sixth portion, extending from the otherend of the second portion to the outer frame, and a seventh portion,extending from the other end of the fourth portion to the outer frame.

The lens moving apparatus may further include a third solder portion,disposed on the outer frame of the first spring and on the sixth portionof the second coil, and a fourth solder portion, disposed on the outerframe of the second spring and on the seventh portion of the secondcoil.

The third portion of the second coil may be disposed at a first cornerportion of the housing, and the fifth portion of the second coil may bedisposed at a second corner portion of the housing, which is adjacent tothe first corner portion.

The outer surface of the housing may include a first recess, in whichthe first portion of the second coil is disposed, a second recess, inwhich the third portion of the second coil is disposed, the secondrecess being connected to the first recess, and a third recess, in whichthe fifth portion of the second coil is disposed, the third recess beingconnected to the first recess.

The second coil may not overlap the first coil in a direction parallelto an optical axis, the first portion of the second coil may not overlapthe first coil in a direction perpendicular to the optical axis, and thesecond coil may be located above the first coil based on the lowerportion of the bobbin.

Advantageous Effects

According to embodiments, it is possible to directly perform a solderingprocess without separate wire arrangement for a second coil at the timeof soldering between the second coil and lower springs and to preventmovement or shaking of the second coil at the time of soldering, therebyimproving solderability.

DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view showing a lens moving apparatus accordingto an embodiment;

FIG. 2 is an exploded view of the lens moving apparatus shown in FIG. 1;

FIG. 3 is a perspective view of the lens moving apparatus with the covermember shown in FIG. 1 removed;

FIG. 4 is a first perspective view of the bobbin shown in FIG. 1 ;

FIG. 5 is a second perspective view of the bobbin and the first coilshown in FIG. 1 ;

FIG. 6 is a perspective view of the housing shown in FIG. 1 ;

FIG. 7 is a perspective view showing coupling between the housing andthe magnet shown in FIG. 1 ;

FIG. 8 is a top perspective view of FIG. 2 with a base omitted;

FIG. 9 is a bottom perspective view of FIG. 8 ;

FIG. 10 is a perspective view of the base and a lower elastic member,which are separated from each other;

FIG. 11 is a view showing an embodiment of coupling between a secondcoil and a first lower spring and coupling between the second coil and asecond lower spring;

FIG. 12 is a view showing another embodiment of coupling between thesecond coil and the first lower spring and coupling between the secondcoil and the second lower spring;

FIG. 13 is an exploded perspective view showing a camera moduleaccording to an embodiment;

FIG. 14 is a block diagram showing an embodiment of the image sensorshown in FIG. 13 ;

FIG. 15 is a perspective view showing a portable terminal according toan embodiment; and

FIG. 16 is a view showing the construction of the portable terminalshown in FIG. 15 .

BEST MODE

Reference will now be made in detail to embodiments, examples of whichare illustrated in the accompanying drawings. In the followingdescription of the embodiments, it will be understood that when anelement, such as a layer (film), a region, a pattern, or a structure isreferred to as being “on” or “under” another element, such as asubstrate, a layer (film), a region, a pad, or a pattern, it can be“directly” on or under another element or can be “indirectly” formedsuch that an intervening element is also present. In addition, termssuch as “on” or “under” should be understood on the basis of thedrawings. Wherever possible, the same reference numbers will be usedthroughout the drawings to refer to the same or like parts.

Hereinafter, a lens moving apparatus according to an embodiment will bedescribed with reference to the accompanying drawings. For theconvenience of description, the lens moving apparatus will be describedusing a Cartesian coordinate system (x, y, z). However, the disclosureis not limited thereto. Other different coordinate systems may be used.In the drawings, an x-axis direction and a y-axis direction aredirections perpendicular to a z-axis direction, which is an optical-axisdirection. The optical axis (OA) direction or the z-axis direction,which is parallel to the optical-axis (OA) direction, may be referred toa “first direction,” the x-axis direction may be referred to a “seconddirection,” and the y-axis direction may be referred to a “thirddirection.”

An “auto-focusing device,” which is applied to a small-sized cameramodule of a mobile device, such as a smartphone or a tablet PC, is adevice for automatically focusing an image of a subject on an imagesensor. The auto-focusing device may be variously configured. In anembodiment, the lens moving apparatus may move an optical moduleincluding at least one lens in the first direction to perform an autofocusing operation.

FIG. 1 is a perspective view showing a lens moving apparatus 100according to an embodiment, FIG. 2 is an exploded view of the lensmoving apparatus 100 shown in FIG. 1 , and FIG. 3 is a perspective viewof the lens moving apparatus 100 with the cover member 300 shown in FIG.1 removed.

Referring to FIGS. 1 to 3 , the lens moving apparatus 100 includes abobbin 110, a first coil 120, a magnet 130, a housing 140, an upperelastic member 150, a lower elastic member 160, a second coil 170, abase 210, and a cover member 300.

First, the cover member 300 will be described.

The cover member 300 receives the bobbin 110, the first coil 120, themagnet 130, the housing 140, the upper elastic member 150, the lowerelastic member 160, and the second coil 170 in a receiving space formedtogether with the base 210.

The cover member 300 may be formed in the shape of a box, the lowerportion of which is open and which includes an upper plate and sideplates. The shape of the upper plate of the cover member 300 may bepolygonal, for example, quadrangular or octagonal. The lower ends of theside plates of the cover member 300 may abut the edge of the uppersurface of the base 210, and may be coupled to each other via anadhesive.

The cover member 300 may be provided in the upper plate thereof with anopening, through which a lens (not shown) coupled to the bobbin 110 isexposed to external light. Also, in order to prevent foreign matter,such as dust or moisture, from permeating into the camera module, awindow made of an optically transmissive material may be furtherprovided in the opening in the cover member 300.

The cover member 300 may be made of a nonmagnetic material, such as SUS,in order to prevent a phenomenon in which the magnet 130 attracts thecover member. However, the disclosure is not limited thereto. In anotherembodiment, the cover member 300 may be made of a magnetic material, andmay function as a yoke for increasing electromagnetic force due tointeraction with the first coil 120.

Next, the bobbin 110 will be described.

FIG. 4 is a first perspective view of the bobbin 110 shown in FIG. 1 ,and FIG. 5 is a second perspective view of the bobbin 110 and the firstcoil 120 shown in FIG. 1 .

Referring to FIGS. 4 and 5 , the bobbin 110 may be disposed inside thehousing 140, and may be moved in the first direction due toelectromagnetic interaction between the coil 120 and the magnet 130.

The lens (not shown) may be directly coupled to the innercircumferential surface 110 a of the bobbin 110. However, the disclosureis not limited thereto. For example, the bobbin 110 may include a lensbarrel (not shown), in which at least one lens is mounted. The lensbarrel LB2 may be coupled inside the bobbin 110 in various manners.

The bobbin 110 may have an opening in which the lens or the lens barrelis mounted. The shape of the opening in the bobbin 110 may coincide withthe shape of the lens or the lens barrel mounted in the opening. Forexample, the shape of the opening in the bobbin 110 may be circular,oval, or polygonal. However, the disclosure is not limited thereto.

The bobbin 110 may have at least one coupling recess 113, which isdisposed in the upper surface thereof so as to be coupled and fixed toan inner frame 151 of the upper elastic member 150, and at least oneprotrusion or coupling protrusion 117, which is disposed on the lowersurface thereof so as to be coupled and fixed to an inner frame 161 ofthe lower elastic member 160. In another embodiment, the portion of thebobbin 110 that is coupled to the inner frame of the upper elasticmember 150 may be a coupling protrusion, rather than the couplingrecess.

The bobbin 110 may have an upper escape recess 1 l 2 a, which isprovided in the region of the upper surface thereof that corresponds toor is aligned with a first connection portion 153 of the upper elasticmember 150.

In addition, the bobbin 110 may have a lower escape recess 112 b, whichis provided in the region of the lower surface thereof that correspondsto or is aligned with a second connection portion 163 of the lowerelastic member 160.

When the bobbin 110 is moved in the first direction, spatialinterference between the first connection portion 153 and the bobbin 110and between the second connection portion 163 and the bobbin 110 may beremoved by the upper escape recess 112 a and the lower escape recess 112b of the bobbin 110, whereby the first connection portion 153 and thesecond connection portion 163 may be more easily elastically deformed.

In another embodiment, the first connection portion of the upper elasticmember and the bobbin may be designed so as not to interfere each other,whereby no upper escape recess and/or no lower escape recess may beprovided in the bobbin.

The bobbin 110 may have a first stopper 114, which protrudes upwardsfrom the upper surface thereof, and a second stopper 116, whichprotrudes downwards from the lower surface thereof. When the bobbin 110is moved in the first direction for auto focusing, the first stopper 114and the second stopper 116 may function to prevent the upper surface ofthe bobbin 110 from directly colliding with the inner wall of the covermember 300 or the upper surface of the base 210 in the case in which thebobbin 110 deviates from a prescribed range due to an external impact.

The bobbin 110 may be provided in the outer circumferential surface 110b thereof with at least one recess 105, in which the first coil 120 isdisposed.

The first coil 120 may be disposed or settled in the recess 105, or thefirst coil 120 may be directly wound in the recess 105 of the bobbin 110about the optical axis OA in a clockwise direction or in acounterclockwise direction.

The shape and number of recesses 105 in the bobbin 110 may correspond tothe shape and number of coils disposed around the outer circumferentialsurface of the bobbin 110. In another embodiment, the bobbin 110 mayhave no recess for coil settlement, and the first coil 120 may bedirectly wound and fixed around the outer circumferential surface of thebobbin 110 having no recess therein.

Next, the first coil 120 will be described.

The first coil 120 is disposed around the outer circumferential surface110 b of the bobbin 110, and electromagnetically interacts with themagnet 130, which is disposed in the housing 140.

In order to generate electromagnetic force due to electromagneticinteraction with the magnet 130, a driving signal may be applied to thefirst coil 120. At this time, the driving signal may include analternating-current signal, or may include an alternating-current signaland a direct-current signal. For example, the alternating-current signalmay be a sinusoidal signal or a pulse signal (e.g. a PWM signal).

The bobbin 110, which is elastically supported by the upper elasticmember 150 and the lower elastic member 160 may be moved in the firstdirection by the electromagnetic force due to electromagneticinteraction between the first coil 120 and the magnet 130. The intensityof the driving signal and/or the polarity of the driving signal may becontrolled in order to control the intensity and/or the direction of theelectromagnetic force. The movement of the bobbin 110 in the firstdirection may be controlled by the controlled electromagnetic force,whereby the auto focusing function may be performed for the lens movingapparatus.

The first coil 120 may be wound so as to wrap the outer circumferentialsurface 110 b of the bobbin 110 about the optical axis in the clockwisedirection or in the counterclockwise direction.

For example, the first coil 120 may have a closed-loop shape that wrapsthe outer circumferential surface of the bobbin 110.

For example, the first coil 120 may be disposed or wound in the recess105 provided in the outer circumferential surface 110 b of the bobbin110.

In another embodiment, the first coil 120 may be realized as a coil ringwound about an axis perpendicular to the optical axis in the clockwisedirection or in the counterclockwise direction. The number of coil ringsmay be equal to the number of magnets 130. However, the disclosure isnot limited thereto.

The first coil 120 may be connected to at least one of the upper elasticmember 150 or the lower elastic member 160. For example, a portion orone end of the first coil 120 may be coupled to one of the upper elasticmember 150 and the lower elastic member 160 using a solder or aconductive adhesive, and another portion or the other end of the firstcoil 120 may be coupled to one of the upper elastic member 150 and thelower elastic member 160 using a solder or a conductive adhesive.

A driving signal may be applied to the first coil 120 through at leastone of the upper elastic member 150 or the lower elastic member 160.

Next, the housing 140 will be described.

FIG. 6 is a perspective view of the housing 140 shown in FIG. 1 , andFIG. 7 is a perspective view showing coupling between the housing 140and the magnet 130 shown in FIG. 1 .

Referring to FIGS. 6 and 7 , the housing 140 supports the magnet 130,and receives the bobbin 110 therein such that the bobbin 110 is movablein the first direction.

The housing 140 may generally have a pillar shape including an opening,and may include first edges 141 and second edges 142.

For example, the housing 140 may have a plurality of edges 141 and 142that define a polygonal (e.g. a quadrangular or octagonal) or circularhollow portion. The upper surfaces of the edges 141 and 142 may definethe upper surface of the housing 140.

For example, the housing 140 may include first edges 141 spaced apartfrom each other and second edges 142 spaced apart from each other. Eachof the second edges may be disposed between two adjacent first edges,and may interconnect the two adjacent first edges.

For example, the first edges 141 of the housing 140 may be disposed atpositions corresponding to the side plates of the cover member 300.

For example, the first edges 141 of the housing 140 may be portionscorresponding to the sides of the housing 140, and the second edges 142of the housing 140 may be portions corresponding to the corners of thehousing 140. The first edges 141 of the housing 140 may be referred toas “edge portions,” and the second edges 142 of the housing 140 may bereferred to as “corner portions.”

For example, the housing 140 may include four edge portions (e.g. firstto fourth edge portions) and four corner portions (e.g. first to fourthcorner portions).

The magnet 130 may be disposed or mounted in each of the first edges 141of the housing 140. For example, a recess 141 a, in which the magnet 130is settled, disposed, or fixed, may be provided in at least one of thefirst edges 141 of the housing 140.

In FIG. 6 , the recesses 141 a are formed through the first edges 141.However, the disclosure is not limited thereto. The recesses may beconcave recesses. In another embodiment, a recess in which the magnet130 is settled may be provided in the inner surface of each of the firstedges 141.

In addition, a first recess 14, in which the second coil 170 is wound orreceived, may be provided in the housing 140. The first recess 14 may bereferred to as a settlement recess.

The first recess 14 may be provided in the outer surface of the housing140. For example, the first recess 14 may be provided in the outersurface of at least one of the first edges 141 or the second edges 142of the housing 140 in a concave shape.

In addition, for example, the first recess 14 may be formed in the outersurface of each of the first edges 141 and/or the second edges 142, andmay have a ring shape.

For example, the first recess 14 of the housing 140 may be provided inthe upper end of the outer surface of each of the first edges 141 andthe second edges 142. For example, the first recess 14 of the housing140 may be located above the recess 141 a, in which the magnet isreceived, may be located under the upper surface of the housing 140, andmay be spaced apart from the recess 141 a.

For example, the first recess 14 may not overlap the recess 141 a in adirection perpendicular to the optical axis OA. However, the disclosureis not limited thereto.

For example, the first recess 14 of the housing 140 may be spaced apartfrom the upper surface of the housing 140, and the depth of the firstrecess 14 may be greater than or equal to the thickness of the secondcoil 170 wound therein. For example, the second coil 170 disposed in thefirst recess 14 may not protrude from the outer surface of each of thefirst edges of the housing 140 and the outer surface of each of thesecond edges of the housing 140. The reason for this is that it isnecessary to prevent the second coil 170 disposed in the first recess 14from deviating from the first recess 14.

The housing 140 may have an upper stopper 143, which protrudes from theupper surface thereof. For example, the upper stopper 143 may bedisposed on the upper surface of each of the second edges. However, thedisclosure is not limited thereto.

The upper stopper 143 of the housing 140 prevents a collision betweenthe cover member 130 and the housing 140. When an external impactoccurs, it is possible to prevent the upper surface of the housing 140from directly colliding with the inner surface of the upper portion ofthe cover member 300.

In addition, a protrusion 144 or an upper protrusion, to which an outerframe 152 of the upper elastic member 150 is coupled, may be provided onthe upper portion of the housing 140.

For example, the protrusion 144 may be disposed on the upper portion ofeach of the second edges 142 of the housing 140 so as to be spaced apartfrom the upper stopper 144. However, the disclosure is not limitedthereto.

The housing 140 may be provided on the lower surface thereof with atleast one protrusion 147 a to 147 d or at least one lower protrusion, towhich an outer frame 162 of the lower elastic member 160 is coupled.

For example, the protrusions 147 a to 147 d may be disposed on the lowerportions of the second edges 142 of the housing 140.

A lower guide recess 148, into which a guide member 216 of the base 210is inserted, fastened, or coupled, may be provided in the lower portionof each of the second edges 142 of the housing 140.

For example, the lower guide recess 148 of the housing 140 and the guidemember 216 of the base 210 may be coupled to each other via an adhesivemember, and the housing 140 may be coupled to the base 210.

A second recess 15 a, in which a third portion 17 c of the second coil170 is disposed, and a third recess 15 b, in which a fifth portion 17 eof the second coil 170 is disposed, may be provided in at least one ofthe first edges of the housing 140. The second recess 15 a and the thirdrecess 15 b will be described below.

Next, the magnet 130 will be described.

At an initial position of the bobbin 110, the magnet 130 may be disposedin each of the edge portions of the housing 140 so as to correspond toor to be aligned with the first coil 120.

Here, the initial position of the bobbin 110 may be the originalposition of an AF operation unit in the state in which no electric poweris applied to the first coil 120 or the position at which the AFoperation unit is located as the result of the upper elastic member 150and the lower elastic member 160 being elastically deformed due only tothe weight of the AF operation unit.

For example, the initial position of the bobbin 110 may be the positionat which the AF operation unit is located when the gravity acts in thedirection from the bobbin 110 to the base 210 or when the gravity actsin the direction from the base 210 to the bobbin 110. The AF operationunit may include the bobbin 110 and the components mounted in the bobbin110, such as the first coil 120.

For example, the magnet 130 may be disposed in the recess 141 a of thehousing 140 so as to overlap or face the first coil 120 in a directionperpendicular to the optical axis.

In another embodiment, no recess 141 a may be formed in each of thefirst edges 141 of the housing 140, or the magnet 130 may be disposed inone of the outer surface and the inner surface of each of the firstedges 141 of the housing 140.

The magnet 130 may include four magnets 130-1 to 140-4, which aredisposed in the four edge portions of the housing 140.

The shape of the magnet 130 may have a shape corresponding to each ofthe first edges 141 of the housing 140, for example, a rectangularparallelepiped shape. However, the disclosure is not limited thereto.

The magnet 130 may be a monopolar magnetized magnet or a bipolarmagnetized magnet disposed such that the surface thereof facing thefirst coil 120 has an S pole and the surface opposite thereto has an Npole. However, the disclosure is not limited thereto. The reverseconstruction is also possible. In addition, the positions of the S poleand the N pole of the magnet 130 may be set such that electromagneticforce due to interaction is generated depending on the disposition ofthe first coil 120.

In this embodiment, the number of magnets 130 is four. However, thedisclosure is not limited thereto. The number of magnets 130 may be atleast two. The surface of each of the magnets 130 that faces the firstcoil 120 may be planar. However, the disclosure is not limited thereto.The surface of the magnet may be curved.

Next, the upper elastic member 150 and the lower elastic member 160 willbe described.

FIG. 8 is a top perspective view of FIG. 2 with the base 210 omitted,FIG. 9 is a bottom perspective view of FIG. 8 , and FIG. 10 is aperspective view of the base 210 and the lower elastic member 160, whichare separated from each other.

Referring to FIGS. 8 to 10 , the upper elastic member 150 and the lowerelastic member 160 are coupled to the bobbin 110 and to the housing 140,and flexibly support the bobbin 110.

For example, the upper elastic member 150 may be coupled to the upperportion (the upper surface or the upper end) of the bobbin 110 and tothe upper portion (the upper surface or the upper end) of the housing140.

In addition, for example, the lower elastic member 160 may be coupled tothe lower portion (the lower surface or the lower end) of the bobbin 110and to the lower portion (the lower surface or the lower end) of thehousing 140.

In FIG. 8 , the upper elastic member 150 is not divided into a pluralityof members. However, the disclosure is not limited thereto. In anotherembodiment, the upper elastic member 150 may include a plurality ofsprings or a plurality of upper springs that are spaced apart from eachother.

The upper elastic member 150 may include a first inner frame 151 coupledto the upper portion of the bobbin 110, a first outer frame 152 coupledto the upper portion of the housing 140, and a first connection portion153 for interconnecting the first inner frame 151 and the first outerframe 152.

A through hole 151 a, which is coupled to the coupling recess 113 of thebobbin 110 via solder or a conductive adhesive, may be provided in thefirst inner frame 151 of the upper elastic member 150. In addition, athrough hole (not shown), which is coupled to the protrusion 144 of thehousing 140 via solder or a conductive adhesive 901, may be provided inthe first outer frame 152 of the upper elastic member 150.

The lower elastic member 160 may include two or more springs or lowersprings that are divided from each other.

For example, the lower elastic member 160 may include first to fourthlower springs 160-1 to 160-4, which are spaced apart or separated fromeach other, and the first to fourth lower springs 160-1 to 160-4 may beelectrically separated from each other. The first to fourth lowersprings 160-1 to 160-4 may also be referred to as first to fourthsprings.

For example, the first coil 120 may be connected to two of the springs160-1 to 160-4, and the second coil 170 may be connected to the othertwo of the springs 160-1 to 160-4.

Each of the first to fourth lower springs 160-1 to 160-4 may include asecond inner frame 161 coupled to the lower portion of the bobbin 110, asecond outer frame 162 coupled to the lower portion of the housing 140,and a second connection portion 163 for interconnecting the second innerframe 161 and the second outer frame 162.

A through hole 161 a (see FIG. 10 ), which is coupled to the protrusion117 of the bobbin 110 via solder 902, may be provided in the secondinner frame 161 of the lower elastic member 160.

A through hole 162 a, into which each of the protrusions 147 c and 147 dof the housing 140 is coupled, may be provided in the second outer frame162 of the lower elastic member 160. In addition, a bent portion 162 b,which guides a portion of the outer surface of each of the protrusions147 a and 147 b of the housing 140 and which contacts a portion of theouter surface of each of the protrusions 147 a and 147 b, may beprovided in the second outer frame 162 of the lower elastic member 160.The bent portions 162 b of the second outer frame 162 may be providedsuch that a first distal end 17 b and a second distal end 17 d of thesecond coil 170 can be easily wound around the protrusions 147 a and 147b of the housing 140.

For example, the first coil 120 may be coupled to the second innerframes of two of the first to fourth lower springs 160-1 to 160-4 via asolder or a conductive adhesive member.

For example, the second coil 170 may be coupled to the outer frames ofthe other two of the first to fourth lower springs 160-1 to 160-4 via asolder or a conductive adhesive member.

Each of the upper elastic member 150 and the lower elastic member 160may be realized as a leaf spring. However, the disclosure is not limitedthereto. Each of the upper elastic member 150 and the lower elasticmember 160 may be realized as a coil spring or a suspension wire.

Each of the first connection portion 153 and the second connectionportion 163 may be formed so as to be bent or curved (or crooked) atleast once in order to form a predetermined pattern. The upward and/ordownward movement of the bobbin 110 in the first direction may beflexibly (or elastically) supported through the positional change andminute deformation of the first and second connection portions 153 and163.

In order to prevent an oscillation phenomenon when the bobbin 110 ismoved, a damper may be disposed between the first connection portion 153of the upper elastic member 150 and the upper surface of the bobbin 110,e.g. the upper escape recess 112 a. Alternatively, a damper (not shown)may be disposed between the second connection portion 163 of the lowerelastic member 160 and the lower surface of the bobbin 110, e.g. thelower escape recess 112 b.

In addition, for example, a damper may be coated on a coupling portionbetween the upper elastic member 150 and each of the bobbin 110 and thehousing 140 or on a coupling portion between the lower elastic member160 and each of the bobbin 110 and the housing 140. For example, thedamper may be gel-type silicon.

For example, the first to fourth lower springs 160-1 to 160-4 may beseparated or spaced apart from each other at the first edges 141 of thehousing 140.

A portion or one end of the second coil 170 may be connected to thefirst lower spring 160-1, and another portion or the other end of thesecond coil 170 may be connected to the second lower spring 160-2. Inaddition, a portion or one end of the first coil 120 may be connected tothe third lower spring 160-3, and another portion or the other end ofthe first coil 120 may be connected to the fourth lower spring 160-4.

A first bonding portion 18 a, to which the second portion 17 b of thesecond coil 170 is coupled, may be provided at the second outer frame162 of the first lower spring 160-1, and a second bonding portion 18 b,to which the fourth portion 17 d of the second coil 170 is coupled, maybe provided at the second outer frame 162 of the second lower spring160-2.

The reason that each of the first bonding portion 18 a and the secondbonding portion 18 b is provided at the second outer frame 162 is thatthe second outer frame 162 is closer to the outer surface of the firstedge 141 of the housing 140 than the second inner frame 161, whereby thefirst and second lower springs 160-1 and 160-2 can be more easily bondedto the second coil 170.

In addition, a third bonding portion 19 a, to which a portion or one endof the first coil 120 is coupled, may be provided at the second innerframe 161 of the third lower spring 160-3, and a fourth bonding portion19 b, to which another portion or the other end of the first coil 120 iscoupled, may be provided at the second inner frame 161 of the fourthlower spring 160-4.

The reason that each of the third bonding portion 19 a and the fourthbonding portion 19 b is provided at the second inner frame 161 is thatsecond inner frame 161 is closer to the bobbin 110 than the second outerframe 162, whereby the third and fourth lower springs 160-3 and 160-4can be more easily bonded to the first coil 120.

The first coil 120 is connected to the third and fourth bonding portions19 a and 19 b provided at the second inner frames 161 of the third andfourth lower springs 160-3 and 160-4, and the second coil 170 isconnected to the first and second bonding portions 18 a and 18 bprovided at the second outer frames 162 of the first and second lowersprings 160-1 and 160-2. In this embodiment, therefore, it is possibleto reduce the distance between two points for bonding, whereby it ispossible to more easily perform bonding.

For example, the third bonding portion 19 a and the fourth bondingportion 19 b may be provided at one ends of the second inner frames ofthe third and fourth lower springs (for example, 160-3 and 160-4), whichface each other in the second direction or in the third direction.However, the disclosure is not limited thereto.

For example, the first bonding portion 18 a and the second bondingportion 18 b may be located adjacent to the bent portions 162 b of thesecond outer frames 162 of the first lower spring 160-1 and the secondlower spring 160-2, and may contact the bent portions 162 b. However,the disclosure is not limited thereto.

In the case of the above first to fourth bonding portions 18 a, 18 b, 19a, and 19 b, the “bonding portions” may also be referred to as padportions, connection terminal portions, solder portions, or electrodeportions.

The first to fourth lower springs 160-1 to 160-4 may include onnectionterminals 164-1 to 164-4, which are connected to the outer surfaces ofthe second outer frames 162 and which are bent and extend fromrespective second outer frames 162 toward the base 210.

The connection terminals 164-1 to 164-4 of the first to fourth lowersprings 160-1 to 160-4 may be bent from the second outer frames 162toward the base 210, and may be disposed so as to be spaced apart fromeach other.

Each of the connection terminals 164-1 to 164-4 of the first to fourthlower springs 160-1 to 160-4 may be disposed in, settled in, or insertedinto a corresponding one of concave portions 205 a to 205 d provided inthe base 210.

For example, the first and second connection terminals 164-1 and 164-2of the first and second lower springs 160-1 and 160-2 may be disposed ata first outer surface of the base 210, and may abut the first outersurface.

The third and fourth connection terminals 164-3 and 164-4 of the thirdand fourth lower springs 160-3 and 160-4 may be disposed at a secondouter surface of the base 210, and may abut the second outer surface.For example, the first outer surface and the second outer surface of thebase 210 may face each other or may be opposite each other.

The first to fourth connection terminals 164-1 to 164-4 of the first tofourth lower springs 160-1 to 160-4 may be exposed from the base 210,and the first to fourth connection terminals 164-1 to 164-4 may beelectrically separated from each other.

For example, the inner surface of each of the first to fourth connectionterminals 164-1 to 164-4, which are disposed in the concave portions 205a to 205 d, may abut one surface (e.g. the bottom surface) of acorresponding one of the concave portions 205 a to 205 d.

The outer surface of each of the first to fourth connection terminals164-1 to 164-4, which are disposed in the concave portions 205 a to 205d, may be exposed from the outer surface of the base 210, and the lowerend of each of the first to fourth connection terminals 164-1 to 164-4may be exposed from the lower surface of the base 210.

The depth of each of the concave portions 205 a to 205 d may be greaterthan the thickness of a corresponding one of the first to fourthconnection terminals 164-1 to 164-4, and the outer surface of each ofthe first to fourth connection terminals 164-1 to 164-4, which aredisposed in the concave portions 205 a to 205 d, may not protrude out ofa corresponding one of the concave portions 205 a to 205 d.

Each of the first to fourth connection terminals 164-1 to 164-4 may bemade of a conductive material for the supply of electric power or asignal from the outside, and may be connected to external wires orexternal elements by soldering.

If solder bonded to the first to fourth connection terminals 164-1 to164-4 protrudes out of the outer surface of the base 210, the solderbonded to the first to fourth connection terminals 164-1 to 164-4 maycontact or collide with the cover member 300, whereby an electric shortcircuit or open circuit may occur. In this embodiment, sufficient depthof the concave portions 205 a to 205 d is secured such that the solderbonded to the first to fourth connection terminals 164-1 to 164-4 doesnot protrude out of the outer surface of the base 210, whereby it ispossible to prevent an electric short circuit or open circuit.

If the first and second coils 120 and 170 are directly bonded to theconnection terminals 164-1 to 164-4 by first solder, the first soldermay melt when soldering is performed on the first to fourth connectionterminals 164-1 to 164-4 for connection with the outside, wherebyconnection of the first and second coils 120 and 170 may be interrupted.

In this embodiment, the first to fourth bonding portions 18 a, 18 b, 19a, and 19 b, to which the first coil 120 and the second coil 170 arebonded, are provided at the lower elastic member 160 separately from thefirst to fourth connection terminals 164-1 to 164-4. When soldering isperformed on the first to fourth connection terminals 164-1 to 164-4,therefore, it is possible to prevent the interruption of connectionbetween the first and second coils 120 and 170 and the first to fourthlower springs 160-1 to 160-4.

In the case of the above connection terminals 164-1 to 164-4, the“connection terminals” may also be referred to as pad portions, bondingportions, solder portions, or electrode portions.

An induction voltage of the second coil 170 may be output to the outsidethrough the first and second connection terminals 164-1 and 164-2 of thefirst and second lower springs 160-1 and 160-2, and a driving signal fordriving the first coil 120 may be provided to the third and fourthconnection terminals 164-3 and 164-4 of the third and fourth lowersprings 160-3 and 160-4.

In the above embodiment, the first to fourth connection terminals 164-1to 164-4 are integrally formed with the second outer frames, and arebent from the second outer frames. However, the disclosure is notlimited thereto.

In another embodiment, the connection terminals for connection withexternal terminals may not be integrally formed with the second outerframes of the first to fourth lower springs, may be provided separatelyfrom the lower elastic member, may be disposed in the concave portion205 a to 205 d, and may be coupled to the second outer frames of thefirst to fourth lower springs via a solder or a conductive adhesivemember.

In the embodiment of FIG. 2 , the terminals 164-1 to 164-4 forconnection with the outside are provided at the lower elastic member160. In another embodiment, however, the terminals 164-1 to 164-4 may beomitted, and a board including terminals for connection with the outside(e.g. a circuit board) may be provided. At this time, the circuit boardmay include terminals connected to the first to fourth lower springs160-1 to 160-4, and may be disposed in the housing 140 or the base 210.

Next, the second coil 170 will be described.

The second coil 170 is disposed on the outer surface of the housing 140.For example, the second coil 170 may be disposed in the first recess 14,or may be directly wound in the first recess 14. A portion of the secondcoil 170 may be wound around the first protrusion 147 a of the housing140, and another portion of the second coil 170 may be wound around thesecond protrusion 147 b of the housing 140. For example, the second coil170 may have a closed-loop shape that is disposed on the outer surfaceof the housing 140.

The second coil 170 may not overlap the first coil 120 in a directionparallel to the optical axis or in the first direction.

A first portion 17 a of the second coil 170 may not overlap the magnet130 in a direction parallel to the optical axis (or the first direction)and in a direction perpendicular to the optical axis. The reason forthis is that it is necessary to reduce interference between the magnet130 and the second coil 170. In another embodiment, the first portion 17a of the second coil 170 may overlap the magnet 130 in a directionparallel to the optical axis (or the first direction).

In addition, at the initial position of the bobbin 110, the firstportion 17 a of the second coil 170 may be located so as to be spacedapart from the first coil 120 by a predetermined distance in the firstdirection, and may not overlap the first coil 120 in a directionperpendicular to the first direction.

For example, at the initial position of the bobbin 110, the second coil170 may be located above the first coil 120 based on the lower surfaceof the bobbin 110.

The reason that the predetermined distance between the first coil 120and the second coil 170 in the first direction is maintained is that itis necessary to secure the linearity of the induction voltage that isinduced in the second coil 170 by a driving signal, e.g. a drivingcurrent, applied to the first coil 120.

The second coil 170 may overlap the magnet 130 in the first direction.However, the disclosure is not limited thereto. In another embodiment,said elements may not overlap each other in the first direction.

The second coil 170 may not overlap the first connection portion 153 ofthe upper elastic member 150 or the second connection portion 163 of thelower elastic member 160 in the first direction, and may be located atthe outside based on the first and second connection portions 153 and163. Here, the outside may be the side opposite the central direction ofthe housing 140 based on the first and second connection portions. As aresult, for a given number of windings, it is possible to increase thelength of the second coil 170.

An induction voltage is generated in the second coil 170 due to mutualinduction with the first coil 120, to which a driving signal (e.g. adriving current) is applied.

The first coil may be moved together with the bobbin 110 in the firstdirection by electromagnetic force generated by electromagneticinteraction between current flowing in the first coil 120 according tothe driving signal and the magnet 130.

As the first coil 120 is moved in the first direction, the distancebetween the first coil 120 and the second coil 170 may be changed, andas the distance is changed, an induction voltage may be generated in thesecond coil 170.

For example, as the distance between the first coil 120 and the secondcoil 170 decreases, the induction voltage generated in the second coil170 may increase, and as the distance between the first coil 120 and thesecond coil 170 increases, the induction voltage generated in the secondcoil 170 may decrease.

The displacement of the first coil 120 and the bobbin 110 may be sensedbased on the voltage induced in the second coil 170, and thedisplacement of the bobbin 110 or the driving signal that is provided tothe first coil 120 may be feedback-controlled based on the senseddisplacement of the bobbin 110.

FIG. 11 is a view showing an embodiment of coupling between the secondcoil 170 and the first lower spring 160-1 and coupling between thesecond coil 170 and the second lower spring 160-2.

Referring to FIG. 11 , the portion of the second coil 170 that isdisposed in the housing 140 is wound around the first protrusion 147 aof the housing 140 at least once, and another portion of the second coil170 is wound around the second protrusion 147 b of the housing 140 atleast once.

The reason that a portion of the second coil 170 is wound around thefirst protrusion and another portion of the second coil 170 is woundaround the second protrusion 147 b is that it is possible to solder aportion of the second coil 170 to the second outer frame of the firstlower spring 160-1 and to solder another portion of the second coil 170to the second outer frame of the second lower spring 160-2 withoutseparate wire arrangement. Another reason is that, at the time ofsoldering, it is possible to stably and securely fix a portion andanother portion of the second coil 170 to the first and secondprotrusions 147 a and 147 b of the housing 140, thereby preventingmovement or shaking of the second coil 170 and thus improvingsolderability.

For example, the second coil 170 may include a first portion 17 adisposed at the side surface (or the outer surface), e.g. the firstrecess 14, of the housing 140, a second portion 17 b wound around thefirst protrusion 147 a of the housing 140, a third portion 17 cconnecting one end of the first portion 17 a and the second portion 17 bto each other, a fourth portion 17 d wound around the second protrusion147 b of the housing 140, and a fifth portion 17 e connecting the otherend of the first portion 17 a and the fourth portion 17 d to each other.

The first portion 17 a may be referred to as a “main body” of the coil170, the second portion 17 b may be referred to as a “first woundmember,” the third portion 17 c may be referred to as a “firstconnection line,” the fourth portion 17 d may be referred to as a“second wound member,” and the fifth portion 17 e may be referred to asa “second connection line.”

For example, the first portion 17 a of the second coil 170 may have aclosed-loop, coil-ring, or ring shape disposed so as to wrap the outersurface of the housing 140.

The first protrusion 147 a may be disposed on the lower surface of thefirst corner portion of the housing 140, the second protrusion 147 b maybe disposed on the lower surface of the second corner portion of thehousing 140, and the first corner portion and the second corner portionmay be located at opposite sides of one edge of the housing 140.

The second recess 15 a may be disposed in the outer surface of the firstcorner portion of the housing 140, and the third recess 15 b may bedisposed in the outer surface of the second corner portion of thehousing 140.

For example, the second recess 15 a of the housing 140 may be disposedin one side of the recess 141 a provided in the housing 140 fordisposition of the magnet 130-1, and the third recess 15 b may bedisposed in the other side of the recess 141 a.

The third portion 17 c of the second coil 170 may be disposed in thesecond recess 15 a, and the fifth portion 17 e of the second coil 170may be disposed in the third recess 15 b.

The third portion 17 c of the second coil 170 may be disposed at oneside of the magnet 130-1 disposed in one of the first edges of thehousing 140, and the fifth portion 17 e of the second coil 170 may bedisposed at the other side of the magnet 130-1.

For example, the third portion 17 c of the second coil 170 may bedisposed at the first corner portion, among the corner portions of thehousing 140, and the fifth portion 17 e of the second coil 170 may bedisposed at the second corner portion, which is adjacent to the firstcorner portion.

In order to prevent the third portion 17 c and the fifth portion 17 e ofthe second coil 170 from deviating from the outer surface of the edge ofthe housing 140, the depth of each of the second recess 15 a and thethird recess 15 b may be greater than the thickness of a strand of thesecond coil 170.

Each of the second recess 15 a and the third recess 15 b may beconnected to the first recess 14, and may extend from the first recess14 to the lower end of the housing 140.

For example, for stable fixing, the number of turns that the secondportion 17 b of the second coil 170 is wound around the first protrusion147 a and the number of turns that the fourth portion 17 d of the secondcoil 170 is wound around the second protrusion 147 b may be 3 to 10.However, the disclosure is not limited thereto.

The bent portion 162 b provided at the second outer fame 162 of thefirst lower spring 160-1 may be disposed at the lower surface of thefirst corner portion, and the bent portion 162 b provided at the secondouter frame 162 of the second lower spring 160-2 may be disposed at thelower surface of the second corner portion.

The second coil 170 may include a conductive wire and a cladding member(e.g. an insulation portion) for wrapping the conductive wire, and theconductive wire of the second portion 17 b and the fourth portion 17 dof the second coil 170 may be exposed from the cladding member. Thereason for this is that it is necessary to connect the second coil 170to the first and second lower springs 160-1 and 160-2 by soldering.

As shown in FIG. 11 , the lens moving apparatus 100 according to theembodiment may further include a first solder portion 31 a, disposed onthe first bonding portion 18 a of the first lower spring 160-1 and onthe second portion 17 b of the second coil 170, and a second solderportion 31 b, disposed on the second bonding portion 18 b of the secondlower spring 160-12 and on the fourth portion 17 d of the second coil170.

The first solder portion 31 a may contact the bent portion 162 b of thefirst lower spring 160-1 and the second portion 17 b of the second coil170.

For example, the first solder portion 31 a may contact the portion atwhich the bent portion 162 b of the second outer frame 162 of the firstlower spring 160-1 contacts the first protrusion 147 a of the housing140.

The second solder portion 31 b may contact the bent portion 162 b of thesecond outer frame 162 of the second lower spring 160-2 and the fourthportion 17 d of the second coil 170.

For example, the second solder portion 31 b may contact the portion atwhich the bent portion 162 b of the second outer frame 162 of the secondlower spring 160-2 contacts the second protrusion 147 b of the housing140.

In another embodiment, the first solder portion 31 a may cover the firstprotrusion 147 a and the entirety of the second portion 17 b of thesecond coil 170, and the second solder portion 31 b may cover the secondprotrusion 147 ab of the housing 140 and the entirety of the fourthportion 17 d of the second coil 170.

In this embodiment, no separate circuit board is used to provide adriving signal to the first coil 120 or to transfer the inductionvoltage of the second coil 170 to the outside. The driving signal may bedirectly provided to the first coil 120, and the induction voltageinduced in the second coil 170 may be transferred to the outside throughthe first to fourth connection terminals 164-1 to 164-4 of the first tofourth lower springs 160-1 to 160-4, whereby manufacturing costs may bereduced.

In addition, since opposite ends of the second coil 170 are wound aroundthe first and second protrusions 147 a and 147 b of the housing 140, inthis embodiment, the soldering process may be directly performed withoutseparate wire arrangement at the time of soldering between the secondcoil 170 and the first and second lower springs 160-1 and 160-2.

In another embodiment, the second coil 170 may include a first portion17 a disposed at the side surface of the housing 140, a second portion17 b wound around the first protrusion 147 a and connected to the firstlower spring 160-1, a third portion 17 d wound around the secondprotrusion 147 b and connected to the second lower spring 160-2, a firstconnection line (or a first connection portion) 17 c connecting one endof the first portion 17 a and the second portion 17 b to each other, anda second connection line (or a second connection portion) 17 econnecting the other end of the first portion 17 a and the third portion17 d to each other.

FIG. 12 is a view showing another embodiment of coupling between asecond coil 170-1 and the first lower spring 160-1 and coupling betweenthe second coil 170-1 and the second lower spring 160-2.

Referring to FIG. 12 , a portion of the second coil 170-1 disposed inthe housing 140 may include a first extension line 17 f wound around thefirst protrusion 147 a of the housing 140 at least once and extending tothe first bonding portion 18 a of the second outer frame 162 of thefirst lower spring 160-1.

A first solder portion 32 a may be disposed on the first extension line17 f and on the first bonding portion 18 a. The first extension line 17f and the first bonding portion 18 a of the second outer frame 162 ofthe first lower spring 160-1 may be connected to each other by the firstsolder portion 32 a.

In addition, another portion of the second coil 170-1 disposed in thehousing 140 may include a second extension line 17 g wound around thesecond protrusion 147 b of the housing 140 at least once and extendingto the second bonding portion 18 b of the second outer frame 162 of thesecond lower spring 160-2.

A second solder portion 32 b may be disposed on the second extensionline 17 g and on the second bonding portion 18 b. The second extensionline 17 g and the second bonding portion 18 b of the second outer frame162 of the second lower spring 160-2 may be connected to each other bythe second solder portion 32 b.

For example, the first solder portion 32 a may be spaced apart from thesecond portion 17 b of the second coil 170-1, and the second solderportion 32 b may be spaced apart from the fourth portion 17 d of thesecond coil 170-1. As a result, the length of the second coil 170-1 maybe further increased.

The second coil 170-1 may include a conductive wire and a claddingmember (e.g. an insulation portion) for wrapping the conductive wire,and the conductive wire of the first extension line 17 f and the secondextension line 17 g of the second coil 170-1 may be exposed from thecladding member. The reason for this is that it is necessary to connectthe second coil 170-1 to the first and second lower springs 160-1 and160-2 by soldering.

For example, the second coil 170-1 may include a first portion 17 adisposed in the first recess 14 of the housing 140, a second portion 17b wound around the first protrusion 147 a of the housing 140, a thirdportion 17 c connecting one end of the first portion 17 a and the secondportion 17 b to each other, a fourth portion 17 d wound around thesecond protrusion 147 b of the housing 140, a fifth portion 17 econnecting the other end of the first portion 17 a and the fourthportion 17 d to each other, a sixth portion extending from one end ofthe second portion 17 b, and a seventh portion extending from one end ofthe fourth portion 17 d.

For example, the sixth portion of the second coil 170-1 may be the firstextension line 17 f, and the seventh portion of the second coil 170-1may be the first extension line 17 g.

In another embodiment, the second coil 170-1 may include a first portion17 a disposed at the side surface of the housing 140, a second portion17 b wound around the first protrusion 147 a of the housing 140 andconnected to the first lower spring 160-1, a third portion 17 d woundaround the second protrusion 147 b and connected to the second lowerspring 160-2, a first connection line (or a first connection portion) 17c connecting one end of the first portion 17 a and the second portion 17b to each other, a second connection line (or a second connectionportion) 17 e connecting the other end of the first portion 17 a and thethird portion 17 d to each other, a first extension line 17 f extendingfrom one end of the second portion 17 b, and a second extension line 17g extending from one end of the third portion 17 d.

The first portion 17 a, which is the main body of the second coil 170 or170-1 shown in FIGS. 11 and 12 , may be a portion that generates aninduction voltage through interaction with the first coil 120.

The second to fifth portions 17 b to 17 e of the second coil 170 or thesecond to seventh portions 17 b to 17 g of the second coil 170-1 may beportions extending from the first portion 17 a, which is the main bodyof the second coil 170 or 170-1.

Since the second coil 170 or 170-1, disposed in the housing 140, extendsto the first and second bonding portions 18 a and 18 b of the first andsecond lower springs 160-1 and 160-2, the length of the second coil 170or 170-1 may be increased. As the length of the second coil 170 or 170-1is increased, the resistance of the second coil 170 or 170-1 may alsoincrease. As a result, the magnitude of the induction voltage induced inthe second coil 170 or 170-1 may increase, whereby it is possible toimprove sensitivity in detecting the position of the bobbin 110 for AFfeedback driving.

The base may be disposed under the lower elastic member 160, and maydefine a receiving space for receiving the bobbin 110 and the housing140 together with the cover member 300. The base 210 may have an openingcorresponding to the opening in the bobbin 110 and/or the opening in thehousing 140, and may have a shape coinciding with or corresponding tothe shape of the cover member 300, for example, a quadrangular shape.

The base 210 may include a guide member 216 (see FIG. 10 ) protrudingupwards from each of the four corners thereof by a predetermined height.The guide member 216 may have a polygonal prismatic shape protrudingfrom the upper surface of the base 210 so as to be perpendicular to theupper surface of the base 210. However, the disclosure is not limitedthereto.

The concave portions 205 a to 205 d may be provided in the outer surfaceof the base 210. For example, the concave portions 205 a to 205 d of thebase 210 may be provided in the outer surfaces of facing edges of thebase 210 so as to be spaced apart from each other.

For example, in another embodiment, the concave portions 205 a to 205 dmay be provided in the outer surfaces of two first edges of the base 210that do not face each other depending on the positions at which thefirst to fourth connection terminals 164-1 to 164-4 are disposed.

For example, each of the concave portions 205 a to 205 d may include anupper opening formed toward the upper surface of the base 210 and alower opening formed toward the lower surface of the base 210.

A protrusion 21 for guiding the inner frames of the lower springs may beprovided on the upper surface of the base 210. The protrusion 21 may bedisposed around the opening in the base 210, and may include a pluralityof portions that are spaced apart from each other.

Meanwhile, the lens moving apparatus according to the above embodimentmay be used in various fields, such as those of a camera module or anoptical instrument.

For example, the lens moving apparatus 100 according to the embodimentmay be included in an optical instrument configured to form an image ofan object in a space using reflection, refraction, absorption,interference, diffraction, etc., which are characteristics of light, toincrease the visual power of the eyes, to record or reproduce an imageformed by a lens, to perform optical measurement, or to propagate ortransfer an image. For example, an optical instrument according to anembodiment may include a smartphone or a portable terminal equipped witha camera.

FIG. 13 is an exploded perspective view showing a camera module 200according to an embodiment.

Referring to FIG. 13 , the camera module 200 may include a lens or alens barrel 400, a lens moving apparatus 100, an adhesive member 612, afilter 610, a first holder 600, a second holder 800, an image sensor810, a motion sensor 820, a controller 830, and a connector 840.

The lens or the lens barrel 400 may be mounted in the bobbin 110 of thelens moving apparatus 100.

The first holder 600 may be disposed under the base 210 of the lensmoving apparatus 100. The filter 610 may be mounted to the first holder600, and the first holder 600 may be provided with a protrusion, onwhich the filter 610 is settled.

The adhesive member 612 may couple or adhere the base 210 of the lensmoving apparatus 100 to the first holder 600. The adhesive member 612may function to prevent foreign matter from being introduced into thelens moving apparatus 100, in addition to the adhesive function.

For example, the adhesive member 612 may be epoxy, a thermohardeningadhesive, or a UV-hardening adhesive.

The filter 610 may function to prevent a specific-frequency-bandcomponent of the light passing through the lens barrel 400 from beingincident on the image sensor 810. The filter 610 may be an infraredcutoff filter. However, the disclosure is not limited thereto. At thistime, the filter 610 may be disposed parallel to the x-y plane.

An opening, through which light passing through the filter 610 isincident on the image sensor 810, may be provided in the region of thefirst holder 600 on which the filter 610 is mounted.

The second holder 800 may be disposed under the first holder 600, andthe image sensor 810 may be mounted on the second holder 600. The imagesensor 810 is a region on which light passing through the filter 610 isincident in order to form an image including the light.

The second holder 800 may be provided with various circuits, elements,and a controller in order to convert an image formed on the image sensorinto an electrical signal and transfer the electrical signal to anexternal apparatus.

The second holder 800 may be realized as a circuit board, on which theimage sensor may be mounted, on which a circuit pattern may be formed,and on which various elements are coupled to each other. The firstholder 600 may also be referred to as a “holder” or a “sensor base,” andthe second holder 800 may also be referred to as a “board” or a “circuitboard.”

The image sensor 810 may receive an image included in the light incidentthrough the lens moving apparatus 100, and may convert the receivedimage into an electrical signal.

The filter 610 and the image sensor 810 may be disposed so as to bespaced apart from each other in the state of being opposite each otherin the first direction.

The motion sensor 820 may be mounted on the second holder 800, and maybe connected to the controller 830 via the circuit pattern provided onthe second holder 800.

The motion sensor 820 outputs information about rotational angularvelocity based on the movement of the camera module 200. The motionsensor 820 may be realized as a two-axis or three-axis gyro sensor or anangular velocity sensor.

The controller 830 is mounted on the second holder 800. The secondholder 800 may be connected to the lens moving apparatus 100. Forexample, the second holder 800 may be connected to the first coil 120and the second coil 170 or 170-1 of the lens moving apparatus 100.

For example, the second holder 800 may include terminals connected tothe first to fourth connection terminals 164-1 to 164-4 of the first tofourth lower springs 160-1 to 160-4.

For example, a driving signal may be provided to the first coil 120through the second holder 800, and the induction voltage of the secondcoil 170 or 170-1 may be transferred to the second holder 800. Forexample, the induction voltage of the second coil 170 or 170-1 may bereceived by the controller 830.

For example, the controller 830 may sense the displacement of the bobbin110 using the received induction voltage of the second coil 170 or170-1, and may perform AF feedback driving using the sensed displacementof the bobbin 110.

The connector 840 may be connected to the second holder 800, and mayhave a port for connection with an external apparatus.

FIG. 14 is a block diagram showing an embodiment of the image sensor 810shown in FIG. 13 .

Referring to FIG. 14 , the image sensor 810 includes a sensingcontroller 905, a pixel array 910, and an analog-digital convertingblock 920.

The sensing controller 905 outputs control signals (e.g. a reset signalRX, a transfer signal TX, and a selection signal SE for controllingtransistors included in the pixel array 910 and control signals Sc forcontrolling the analog-digital converting block 920.

The pixel array 910 may include a plurality of unit pixels P11 to Pnm (nand m being natural numbers greater than 1), and the unit pixels P11 toPnm may be arranged so as to have a matrix shape including rows andcolumns. Each of the unit pixels P11 to Pnm may be a photoelectrictransformation element for sensing light and converting the sensed lightinto an electrical signal.

The pixel array 910 may include sensing lines connected to output endsof the unit pixels P11 to Pnm.

For example, each of the unit pixels P11 to Pnm may include aphotodiode, a transfer transistor, a reset transistor, a drivetransistor, and a select transistor. However, the disclosure is notlimited thereto. The number of transistors included in each unit pixelis not limited to 5, but may be 3 or 5.

The photodiode may absorb light and generate an electric charge usingthe absorbed light.

The transfer transistor may transfer the electric charge, generated bythe photodiode, to a sensing node (e.g. a floating diffusion region) inresponse to the transfer signal TX. The reset transistor may reset theunit pixels in response to the reset signal RX. The drive transistor maybe controlled in response to the voltage of the sensing node, may berealized as a source follower, and may function as a buffer. The selecttransistor may be controlled by the selection signal SE, and may outputsensing signals Va to output terminals of the unit pixels.

The analog-digital converting block 920 samples the sensing signals Va,which are analog signals output from the pixel array 910, and converts asampled sensing signal into a digital signal Ds. The analog-digitalconverting block 920 may perform correlated double sampling (CDS) inorder to remove the inherent fixed-pattern noise of each pixel.

The sensing controller 905 and the analog-digital converting block 920may be realized separately from the controller 830. However, thedisclosure is not limited thereto. The sensing controller 905, theanalog-digital converting block 920, and the controller 830 may berealized as a single controller.

FIG. 15 is a perspective view showing a portable terminal 200A accordingto an embodiment, and FIG. 16 is a view showing the construction of theportable terminal 200A shown in FIG. 15 .

Referring to FIGS. 15 and 16 , the portable terminal 200A (hereinafter,referred to as a “terminal”) may include a body 850, a wirelesscommunication unit 710, an A/V input unit 720, a sensing unit 740, aninput/output unit 750, a memory unit 760, an interface unit 770, acontroller 780, and a power supply unit 790.

The body 850 shown in FIG. 15 has a bar shape. However, the disclosureis not limited thereto. The body may have any of various structures,such as a slide type structure, a folder type structure, a swing typestructure, and a swivel type structure, in which two or more sub-bodiesare coupled so as to be movable relative to each other.

The body 850 may include a case (casing, housing, cover, etc.) thatdefines the external appearance thereof. For example, the body 850 maybe divided into a front case 851 and a rear case 852. Various electronicparts of the terminal may be mounted in the space defined between thefront case 851 and the rear case 852.

The wireless communication unit 710 may include one or more modules thatenable wireless communication between the terminal 200A and a wirelesscommunication system or between the terminal 200A and a network in whichthe terminal 200A is located. For example, the wireless communicationunit 710 may include a broadcast receiving module 711, a mobilecommunication module 712, a wireless Internet module 713, a nearfieldcommunication module 714, and a position information module 715.

The A/V (audio/video) input unit 720, which is provided to input anaudio signal or a video signal, may include a camera 721 and amicrophone 722.

The camera 721 may include a camera module 200 according to theembodiment shown in FIG. 13 .

The sensing unit 740 may sense the current state of the terminal 200A,such as the opening and closing state of the terminal 200A, the positionof the terminal 200A, whether a user contacts the terminal, theorientation of the terminal 200A, and acceleration/deceleration of theterminal 200A, in order to generate a sensing signal for controlling theoperation of the terminal 200A. For example, in the case in which theterminal 200A is a slide phone, the sensing unit may sense whether theslide phone is open or closed. In addition, the sensing unit senseswhether power is supplied from the power supply unit 790 and whether theinterface unit 770 is coupled to an external instrument.

The input/output unit 750 is provided to generate input or outputrelated to visual sensation, auditory sensation, or tactile sensation.The input/output unit 750 may generate input data for controlling theoperation of the terminal 200A, and may display information processed bythe terminal 200A.

The input/output unit 750 may include a keypad unit 730, a displaymodule 751, a sound output module 752, and a touchscreen panel 753. Thekeypad may generate input data through a keypad input.

The display module 751 may include a plurality of pixels, the color ofwhich is changed according to an electrical signal. For example, thedisplay module 751 may include at least one of a liquid crystal display,a thin film transistor-liquid crystal display, an organic light-emittingdiode, a flexible display, or a 3D display.

The sound output module 752 may output audio data received from thewireless communication unit 710 in a call signal reception mode, atelephone communication mode, a recording mode, a voice recognitionmode, or a broadcast reception mode, or may output audio data stored inthe memory unit 760.

The touchscreen panel 753 may convert the change of capacitance due to auser's touch on a specific region of the touchscreen into an electricalinput signal.

The memory unit 760 may store a program for processing and control ofthe controller 780, and may temporarily store input/output data (forexample, a telephone directory, messages, audio, still images,photographs, and video). For example, the memory unit 760 may storeimages, such as photographs or video, captured by the camera 721.

The interface unit 770 functions as a path for connection between theterminal 200A and an external instrument. The interface unit 770 mayreceive data from the external instrument, may receive electric powerand transmit the received electric power to internal components of theterminal 200A, or may transfer data in the terminal 200A to the externalinstrument. For example, the interface unit 770 may include awired/wireless headset port, an external charger port, a wired/wirelessdata port, a memory card port, a port for connection with an apparatushaving an identification module, an audio input/output (I/O) port, avideo input/output (I/O) port, and an earphone port.

The controller 780 may control the overall operation of the terminal200A. For example, the controller 780 may perform related control andprocessing for voice communication, data communication, and videocommunication.

The controller 780 may have a multimedia module 781 for multimediareproduction. The multimedia module 781 may be realized in thecontroller 780, or may be realized separately from the controller 780.

The controller 780 may receive the induction voltage of the second coil170 or 170-1 from the camera module, may receive information about thedisplacement of the bobbin 110 acquired by the camera module based onthe induction voltage of the second coil 170 or 170-1, and may performAF feedback driving based on the received induction voltage or theinformation about the displacement of the bobbin 110.

The controller 780 may perform pattern recognition processing that iscapable of recognizing writing input or drawing input performed on thetouchscreen as text or an image, respectively.

The power supply unit 790 may receive external power and internal powerand supply required power to respective components under the control ofthe controller 780.

The features, structures, and effects described in the above embodimentsare included in at least one embodiment, but are not limited only to oneembodiment. Furthermore, features, structures, and effects illustratedin each embodiment may be combined or modified in other embodiments bythose skilled in the art to which the embodiments pertain. Therefore, itis to be understood that such combinations and modifications fall withinthe scope of the present disclosure.

INDUSTRIAL APPLICABILITY

Embodiments may be used in a lens moving apparatus configured such thata soldering process is directly performed without separate wirearrangement for a second coil at the time of soldering between thesecond coil and lower springs and such that the movement or shaking ofthe second coil is prevented at the time of soldering, thereby improvingsolderability, and a camera module and an optical instrument includingthe same.

What is claimed is:
 1. A lens moving apparatus, comprising: a housing; a bobbin disposed in the housing; a first coil disposed on the bobbin; a magnet configured to move the bobbin in a first direction parallel to an optical axis by an electromagnetic interaction with the first coil; an elastic member coupled to the bobbin; and a second coil disposed on the housing and generating an induction voltage resulting from an inductive interaction with the first coil when the bobbin moves in the first direction, wherein a first portion of the second coil is coupled to the housing, wherein the second coil comprises: a main body disposed on an outer surface of the housing; and a connection portion connecting the main body and the first portion thereof, wherein the housing comprises a first recess formed in the outer surface thereof, and the main body is disposed in the first recess, and wherein the housing comprises a second recess connected to the first recess and the connection portion is disposed in the second recess.
 2. The lens moving apparatus according to claim 1, wherein the housing comprises a protrusion coupled to the first portion of the second coil.
 3. The lens moving apparatus according to claim 2, wherein the first portion of the second coil is wound around the protrusion of the housing at least once.
 4. The lens moving apparatus according to claim 2, wherein the protrusion is formed on a lower surface of the housing.
 5. The lens moving apparatus according to claim 1, wherein a driving signal is applied to the first coil.
 6. The lens moving apparatus according to claim 5, wherein the driving signal includes an alternating-current signal, or includes an alternating-current signal and a direct-current signal.
 7. The lens moving apparatus according to claim 1, comprising: a base disposed below the elastic member; and a terminal disposed on the base and connected to the elastic member.
 8. The lens moving apparatus according to claim 1, wherein the main body has a ring shape.
 9. The lens moving apparatus according to claim 1, wherein the elastic member comprises an inner frame coupled to the bobbin, an outer frame coupled to the housing, and a connection portion connecting the inner frame and the outer frame.
 10. A lens moving apparatus, comprising: a housing; a bobbin disposed in the housing; a first coil disposed on the bobbin; a magnet configured to move the bobbin in a first direction parallel to an optical axis by an electromagnetic interaction with the first coil; an elastic member coupled to the bobbin; and a second coil disposed on the housing and generating an induction voltage resulting from an inductive interaction with the first coil when the bobbin moves in the first direction, wherein a first portion of the second coil is coupled to the housing, wherein the elastic member comprises an inner frame coupled to the bobbin, an outer frame coupled to the housing, and a connection portion connecting the inner frame and the outer frame, and wherein the first portion is connected to the outer frame by a solder.
 11. A lens moving apparatus, comprising: a housing; a bobbin disposed in the housing; a first coil disposed on the bobbin; a magnet configured to move the bobbin in a first direction parallel to an optical axis by an electromagnetic interaction with the first coil; an elastic member coupled to the bobbin; and a second coil disposed on the housing and generating an induction voltage resulting from an inductive interaction with the first coil when the bobbin moves in the first direction, wherein a first portion of the second coil is coupled to the housing, wherein the elastic member comprises an inner frame coupled to the bobbin, an outer frame coupled to the housing, and a connection portion connecting the inner frame and the outer frame, and wherein the second coil comprises an extension portion extending from the first portion and connected to the outer frame by a solder.
 12. A lens moving apparatus, comprising: a housing; a bobbin disposed in the housing; a first coil disposed on the bobbin; a magnet configured to move the bobbin in a first direction parallel to an optical axis by an electromagnetic interaction with the first coil; an elastic member coupled to the bobbin; and a second coil comprising a ring-shaped main body disposed in a first recess formed in an outside surface of the housing, wherein the main body is configured to generate an induction voltage resulting from an inductive interaction with the first coil when the bobbin moves in the first direction, and wherein the second coil further comprises an extending portion extending from the ring-shaped main body and disposed within a second recess formed in the outside surface of the housing at a location outside of the magnet.
 13. The lens moving apparatus according to claim 12, wherein the elastic member comprises first and second springs.
 14. The lens moving apparatus according to claim 12, wherein the second coil comprises a fixing portion fixed to the housing.
 15. The lens moving apparatus according to claim 14, wherein the housing comprises a protrusion, and the fixing portion is wound around the protrusion of the housing at least once.
 16. The lens moving apparatus according to claim 15, wherein the protrusion protrudes from a lower surface of the housing.
 17. A camera module comprising: a lens; the lens moving apparatus coupled to the lens according to claim 1; and an image sensor. 